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• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Oct 25-1940 Oct 28

  Reference

  HW 29/54

• Catalogue level

  Piece

  Recommendations of Temporary Staffs Committee following report of the Royal Commission...

  Recommendations of Temporary Staffs Committee following report of the Royal Commission on Civil Service of 1929-1931 as they affected GCCS staff, particularly with regard to establishment of previously unestablished staff

  Held by

  The National Archives, Kew

  Date

  1932-1933

  Reference

  HW 3/54

• Catalogue level

  Piece

  Soviet Comintern messages: ISCOT 101-200

  Soviet Comintern messages: ISCOT 101-200

  Held by

  The National Archives, Kew

  Date

  1944 Apr 30-1944 July 19

  Reference

  HW 17/54

• Catalogue level

  Piece

  Airfields in Italy

  Airfields in Italy

  Held by

  The National Archives, Kew

  Date

  1943 Oct 1-1943 Dec 31

  Reference

  HW 21/54

• Catalogue level

  Piece

  Commercial messages passed over diplomatic channels

  Commercial messages passed over diplomatic channels

  Held by

  Creating government department or its successor

  Date

  1946 Apr 01-1946 Apr 30

  Reference

  HW 32/54

• Catalogue level

  Piece

  Decrypts of Japanese army and army air force messages

  Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Aug 01-1945 Jun 30

  Reference

  HW 52/54

• Catalogue level

  Piece

  'Y' Services: War Instructions

  'Y' Services: War Instructions

  Held by

  The National Archives, Kew

  Date

  1939 Mar 06-1939 Mar 23

  Reference

  HW 2/54

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Dec 05-1943 Dec 08

  Reference

  HW 23/54

• Catalogue level

  Piece

  GAF liaison staff in Italy questions report that English convoy was practically destroyed...

  GAF liaison staff in Italy questions report that English convoy was practically destroyed west of Portugal as it is still in Gibraltar. Report of special operation on Suez area: minelaying and attack on oil refinery. Soviets withdrawing before 2nd Ar…

  Held by

  The National Archives, Kew

  Date

  1941 Sept 8

  Reference

  HW 1/54

• Catalogue level

  Piece

  Miscellaneous correspondence on German weather messages

  Miscellaneous correspondence on German weather messages

  Held by

  The National Archives, Kew

  Date

  1939 Oct 06 - 1940 Apr 03

  Reference

  HW 54/13

• Catalogue level

  Piece

  Correspondence with Middle East signals intercept sites

  Correspondence with Middle East signals intercept sites

  Held by

  The National Archives, Kew

  Date

  1941 Feb 11 - 1943 May 10

  Reference

  HW 54/12

• Catalogue level

  Piece

  Correspondence with the RAF intercept site at Dunstable, Bedfordshire, and the Meteorological...

  Correspondence with the RAF intercept site at Dunstable, Bedfordshire, and the Meteorological Office previously located there

  Held by

  The National Archives, Kew

  Date

  1940 Apr 30 - 1942 Nov 10

  Reference

  HW 54/7

• Catalogue level

  Piece

  Correspondence and notes on Japanese meteorological codes

  Correspondence and notes on Japanese meteorological codes

  Held by

  The National Archives, Kew

  Date

  1944 Mar 21 - 1945 Aug 19

  Reference

  HW 54/11

• Catalogue level

  Piece

  Correspondence with Department of Defense, Washington DC

  Correspondence with Department of Defense, Washington DC

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 15

  Reference

  HW 54/6

• Catalogue level

  Piece

  Itakian naval messages

  Itakian naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Jun 27-1941 Jun 10

  Reference

  HW 18/54

• Catalogue level

  Piece

  Correspondence with USA on European cyphers

  Correspondence with USA on European cyphers

  Held by

  The National Archives, Kew

  Date

  1944 Jan 03 - 1944 Dec 24

  Reference

  HW 54/9

• Catalogue level

  Piece

  Correspondence with the Meteorological Office at the Air Ministry

  Correspondence with the Meteorological Office at the Air Ministry

  Held by

  The National Archives, Kew

  Date

  1940 Mar 13 - 1941 Oct 27

  Reference

  HW 54/18

• Catalogue level

  Piece

  RAF - CMC and ALAMETCO. Missing at transfer

  RAF - CMC and ALAMETCO. Missing at transfer

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1945 Dec 31

  Reference

  HW 40/54

• Catalogue level

  Piece

  Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting...

  Noise Interception and RCM [radio countermeasures]. Notes on the problems of intercepting enemy non-morse transmissions and on the formation of the NIB [Noise Investigation Bureau]

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Apr 18

  Reference

  HW 50/54

• Catalogue level

  Piece

  Liaison with the French on German meteorological cyphers

  Liaison with the French on German meteorological cyphers

  Held by

  The National Archives, Kew

  Date

  1939 Dec 13 - 1940 May 13

  Reference

  HW 54/17